[Can we improve management and control of chronic diseases?]

To evaluate the effectiveness of interventions aimed at improving the quality and outcome of chronic disease management.

Systematic review of the literature.

Clinical trials in English and Spanish that assess the effectiveness of 1 or more strategies for improving quality and outcome in asthma, diabetes, hypertension, and congestive heart failure. Interventions were classified in line with a conceptual model in 6 categories: organizational changes, community participation, information systems, clinical practice design, decision-making support, and self-management. The outcomes considered were: health service utilization, chronic disease management, clinical outcomes, quality of life, satisfaction, and self-management indicators.

Thirty seven studies with 38 interventions were included. The most common interventions were those that investigated changes in health care design, followed by those analysing information systems and decision-making support. The most complex interventions, in terms of the overall number of strategies, including support for self-management, showed more likelihood of positive effects in clinical management and clinical outcomes. Few interventions achieved improvements in use of health care services, though patients perceived substantial improvements.

In order to improve quality and effectiveness of chronic disease management, it is necessary to take a systematic view including proactive health care systems and patients taking an active role in managing their disease. These programmes should combine, at the least, organizational strategies, design of clinical practice and patient self-management.